JPS6342785Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electroacoustic transducer having a headband that can be used as both a headphone and a microphone.

It is well known that a microphone can be used as a speaker and a headphone can be used as a microphone. However, no device has yet been proposed that can easily perform stereo recording and playback with a rich sense of reality using headphones.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electroacoustic transducer having a headband that can easily perform recording and playback with a rich sense of realism.

To achieve the above object, the present invention includes a headband, and a headphone mounted on the headband so as to face each other when used as a headphone.
a pair of reversible electroacoustic transducers configured to be attached to the headband so as to be placed back to back to each other when used as microphones, and configured to be worn on the head; and the reversible electroacoustic transducer. This invention relates to an electroacoustic transducer having a headband that is integrally provided with a headband and a cord connecting portion that is formed to selectively and detachably connect a headphone cord and a microphone cord. .

According to the above-mentioned invention, it is possible to easily obtain both an optimal usage state as a headphone and an optimal usage state as a head microphone.

Next, an electroacoustic transducer having a headband according to an embodiment of the present invention will be described with reference to FIGS. 1 to 16.

This device includes first and second headbands 1 and 2 made of elastic flat metal plates, connecting parts 3 and 4 made of synthetic resin for connecting these, and connecting parts 3 and 4 made of synthetic resin.
It consists of first and second earpieces 5, 6 or reversible electroacoustic transducer parts. FIG. 2 shows the connection between the first headband 1 and the second headband 2. The first headband 1 is inserted into the through hole 7 of the connecting part 3, frictionally engaged therein, and The headband 2 is inserted into the groove 8 and rotatably supported by a shaft 9. Therefore, if one of the first and second headbands 1 and 2, which are curved so that both ends of a U-shape are narrowed, is rotated as shown by the arrow, both ends of the other headband 1 can be rotated. 1a and 1b are expanded, and the pressure of the ear contact parts 5 and 6 is adjusted.

The first and second ear contact parts 5, 6 have substantially the same configuration, and are attached by inserting the ends 1a, 1b of the first headband 1 into the through holes provided therein. There is. These earpieces 5 and 6 have built-in dynamic (electromagnetic) reversible electroacoustic transducers (not shown). That is, it has a built-in electroacoustic transducer that can be used as both a headphone and a head microphone. Further, the back surface 5a of the ear contact portion opposite to the ear rest portion 17 is formed flat so that it can be placed against the ear.

10 and 11 are first and second plugs, to which cords 12 and 13 are connected. 14,
First and second blocking members 15 are detachably attached to both ends of the first headband 1.

Hereinafter, the specific configuration of the first ear contact portion 5 and the blocking member 14 will be explained with reference to FIGS. 3 to 14. Note that the second ear contact portion 6 and the blocking member 15 have the same configuration as the first ear contact portion 5 and the blocking member 14, so a description thereof will be omitted. The earpiece 5 has an earmuff part 16, an electroacoustic transducer part 17, and an engaging part 18, as shown in FIGS. 3 to 5, and the engaging part 18 receives the plug 10. Outlet 19 and insertion portion 20 of first headband 1
is provided. The earpiece main body case 21 is made of synthetic resin and has a housing portion 23 for housing the engagement member 22, and a through hole 24 communicating with the housing portion.
It has 25. And, in this housing part 23,
The engaging member 22 is arranged so as to be rotatable by about 90 degrees, which is less than 180 degrees. The engaging member 22 is shown in FIGS.
As is clear from Figs. 7 and 8, the first
a through hole 26 that holds the headband 1 with frictional force, and a pair of hemispherical protrusions 2 that serve as fulcrums for rotation.
7, 28, and the protrusions 27, 28 are located in the housing portion 23.
point contact with the wall surface. Therefore, the projections 27,2
8 as a fulcrum, the engaging member 22 is shown in FIGS.
It is rotatable in the directions indicated by arrows in FIGS. 7 and 8. The engaging member 22 is made of a slightly elastic synthetic resin, and the through hole 26 is formed to gradually become narrower and then widen again, so that the first headband 1 can be inserted relatively easily. It is possible to achieve this. Also, the first headband 1
Since the through hole 26 is formed to be slightly narrower than the thickness of comes into contact,
This results in an engagement with relatively large frictional force. Note that the engaging member 22 is disposed at a position slightly shifted from the center of the ear contact portion 5.

The plug 10 shown in FIG. 6 is to be inserted into an outlet 19 of the earpiece, and constitutes an electric circuit of an electroacoustic transducer.

9 and 10 are enlarged views showing how the blocking member 14 is attached to the end of the first headband 1. FIG. A notch 29 is provided at the end of the first headband 1 as shown in FIG. 11, and a synthetic resin blocking member 14 shown in FIGS. No. 5 detachment prevention portions are configured. In this embodiment, since the earpiece 5 is required to be detachable from the first headband 1, the blocking member 14 is also formed to be detachable. That is, the pair of flange-shaped portions 30,
The shaft portion 32 of the band 1 is connected to the narrow entrance portion 2 of the cutout portion 29 of the band 1 by utilizing the elastic deformation of the synthetic resin.
9a and is formed so as to be guided to the inner part 29b.

When using the conversion device configured as described above as a headphone, it is attached to the head 33 with the earpiece portions 16 of the pair of earpieces 5 and 6 facing each other as shown in FIG. 12 and 13 are connected to, for example, a tape recorder 34 to listen to the reproduced sound. At this time, the angle of the ear contact parts 5, 6 with respect to the head 33 can be easily adjusted by rotating the main body portions of the ear contact parts 5, 6 using the protrusions 27, 28 as fulcrums. Further, the positions of the ear contact parts 5 and 6 in the height direction can be easily adjusted by moving the ear contact parts 5 and 6 in the vertical direction against the frictional force between the engaging member 22 and the first headband 1. can be achieved. Also, the earpiece 5,
The pressing force of the headband 6 on the ear can be easily adjusted by rotating the second headband 2 with respect to the first headband 1.

On the other hand, when this conversion device is used as a head microphone, as shown in FIG.
Attach to. When placing the heads in this back-to-back state, the blocking members 14 and 15 are
, remove the pair of ear fittings 5 and 6 from the first headband 1, change the direction 180 degrees and attach them to the first headband 1 again, and then attach the blocking members 14 and 15 to the first headband again. Attach it to 1. The cords 12 and 14 are then connected to the recording input terminal of the tape recorder 34. The headphone jack in the stereo tape recorder 34 has a stereo configuration, and the microphone jack has independent left and right channels, so the plug 10 is pulled out from the earpieces 5 and 6, and the microphone cord 12a has independent left and right channels. , 13a are connected. Such switching of connections can be easily achieved since the connection is configured using a plug 10 as shown in FIG. As shown in FIG. 16, if converters with microphones are placed in both ears, recording and reproducing with high fidelity becomes possible. That is,
If recording is performed in a state completely equivalent to the playback state shown in FIG. 15, playback with a rich sense of realism becomes possible.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto and can be further modified. For example, it is of course applicable to cases where electroacoustic transducers other than dynamic transducers are used. Furthermore, like the headphone jack, the microphone may be connected to the tape recorder using a stereo jack.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electroacoustic transducer according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the connecting portion shown in FIG. 1, FIG. 3 is a partially cutaway side view of the earpiece, and FIG. 5 is a plan view of the ear fitting, FIG. 6 is a front view of the plug, FIG. 7 is a sectional view of the engagement member, and FIG. 8 is a cross-sectional view of the engagement member. 9 is a front view of the blocking member, FIG. 10 is a side view of FIG. 9, FIG. 11 is a front view showing the end of the first headband, and FIG. 12 is a front view of the blocking member. Figure, 13th
The figure is a side view of Fig. 12, and Fig. 14 is the XI of Fig. 13.
-XI line sectional view. FIGS. 15 and 16 are plan views showing how the electroacoustic transducer is used. In the symbols used in the drawings, 1 indicates the first headband, 5 indicates the first earpiece, and 6 indicates the second earpiece.
14 and 15 are blocking members, 21 is a main body case, 22 is an engaging member, and 27 and 28 are protrusions.

Claims (1)

[Claims for Utility Model Registration] A headband, which is configured to be attached to the headband so as to face each other when used as a headphone, and to be attached to the headband so as to face each other when used as a microphone, and a pair of reversible electroacoustic transducers configured to be worn on the head; and a headphone cord and a microphone cord that are integrally provided with the reversible electroacoustic transducers and can be selectively and detachably attached. and a cord connection configured to connect to an electroacoustic transducer.